Convert CONFIG_CLOCKS to Kconfig

This converts the following to Kconfig:
   CONFIG_CLOCKS

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/legoev3_defconfig b/configs/legoev3_defconfig
index d616610..3930903 100644
--- a/configs/legoev3_defconfig
+++ b/configs/legoev3_defconfig
@@ -19,6 +19,7 @@
 # CONFIG_DISPLAY_BOARDINFO is not set
 CONFIG_BOARD_EARLY_INIT_F=y
 CONFIG_BOARD_LATE_INIT=y
+CONFIG_CLOCKS=y
 CONFIG_HUSH_PARSER=y
 # CONFIG_BOOTM_NETBSD is not set
 # CONFIG_BOOTM_PLAN9 is not set